For: 2017 - UP ➠ In the diagram, a Broken Line indicates that both connected items will connect together or will connect with the O.E. corresponding item at time of initial fitment. Arrow Part Number - 71672MI Note - This Non Catalytic Link Pipe connects directly to the O.E. Header Pipe system to allow any of the ARROW GP2 # 71521 Series & Indy Race # 71829 Series of silencers designed for this model to be selected for fitment. Or alternatively, the O.E. silencer can be retained. Made from INOX Stainless Steel [AISI 304 grade] for a durable light weight item that allows performance gains. The Link Pipe has provision for the fitment of the O.E. Oxygen Sensors. Specifications for LINK-PIPE - 71672MI Features Details Link Pipe material Stainless steel Link Pipe mounting Welded bracket Junction (inlet) diameter (mm) 53 Junction (outlet) diameter (mm) 55 Sensor plug provision Yes Weight (Kg) 1.47